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单词 升阀
例句 DEFINITIVE EXAMPLES 权威例句〔poppet valve〕An intake or exhaust valve, operated by springs and cams, that plugs and unplugs its opening by axial motion.提升阀:由弹簧及凸轮操纵的一吸气或排气阀,通过往复式运动打开或关闭阀门美国传统〔poppet〕A poppet valve.提升阀美国传统
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